Global Change Master Directorygsfc-gcmduso@mail.nasa.gov502013-05-26T01:24:12Zamd_it Search: Parameters|BIOSPHEREhttp://mddemo.gsfc.nasa.gov/KeywordSearch/OpenSearch.do 33 0 http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA067trace metal in Antarctic ecosystems, larsemann Hills, East Antarctica1996-01-01T00:00:00Z1997-12-30T00:00:00Z2012-08-01T04:00:00ZSediments, mosses and algae, collected from lake catchments of the Larsemann Hills, East Antarctica, were analyzed to establish baseline levels of trace metals (Ag, As, Cd, Co, Cr, Cu, Ni, Sb, Pb, ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA079Benthic Marine Pollution Around McMurdo Station, Antarctica1988-11-01T00:00:00Z1988-11-30T00:00:00Z2012-07-30T04:00:00ZBenthic sediments and animals are highly modified by human activities at McMurdo Station, the largest human settlement in Antarctica. The quantity of anthropogenic debris, contamination of marine ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA057Trace metals in Antarctic copepods from the Weddell Sea (Antarctica)1999-01-18T00:00:00Z1999-02-19T00:00:00Z2012-07-30T04:00:00ZThe concentrations of Cd, Co, Cu, Ni, Pb and Zn were determined in the Antarctic copepods Rhincalanus gigas (Brady, 1883), Calanus propinquus (Brady, 1883), Calanoides acutus (Giesbrecht, 1902), Metridia ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA063Animal excrement: a potential biomonitor of heavy metal contamination57.0,-63.38333,57.0,-63.383331999-01-30T00:00:00Z2002-12-31T00:00:00Z2012-07-12T04:00:00ZTo assess the feasibility of using animal excrement to biomonitor the extent of heavy metal contamination in the marine environment, concentrations of mercury (Hg), lead (Pb), copper (Cu) and zinc ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA062Antarctic Ecosystem: environmental contamination1990-01-01T00:00:00Z2007-12-31T00:00:00Z2012-07-12T04:00:00ZAlthough the remote continent of Antarctica is perceived as the symbol of the last great wilderness, the human presence in the Southern Ocean and the continent began in the early 1900s for hunting, ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA061MIcrobes from seabird faeces to evaluate hreavy metal contamination in antarctic region11.766667,-70.75,11.766667,-70.751999-01-01T00:00:00Z1999-01-30T00:00:00Z2012-07-12T04:00:00ZThis study evaluates the levels of heavy metal pollution in Antarctic marine ecosystem by monitoring gut microbial flora of seabird skua (Catharacta spp). Aerobic and anaerobic bacteria isolated from ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA040POPs in the Fat Tissue of Seabirds from King George Island, Antarctica1997-01-01T00:00:00Z1998-12-30T00:00:00Z2010-06-30T04:00:00ZThis datset collected data for chlorinated pesticides, polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) in subcutaneous fat samples from Brown skuas, three species of penguins: ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA048Residues of Persistent Organochlorine Contaminants in Southern Elephant Seals from Elephant Island, Antarctica1997-11-01T00:00:00Z1998-03-30T00:00:00Z1998-11-01T00:00:00Z1999-03-30T00:00:00Z1999-11-01T00:00:00Z2000-03-30T00:00:00Z2010-06-30T04:00:00ZThis dataset reports a study about blubber samples (n = 129) from live and apparently healthy female and male pups, juveniles and adults of M. leonine (elephant seal) caught at Elephant Island in ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA027Antarctic Ecosystem Environmental Contamination, Climate Change and Human Impact2010-06-22T04:00:00ZIn the Southern Ocean, the marginal ice zone is the nursery ground for E. superba (by far the dominant herbivore), which channels organic matter produced by nanoplankton and diatoms to cephalopods, ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA026Bioconcentration of PCBs in the pelagic food chain of the Ross Sea2010-06-22T04:00:00ZIn this study was measured mean PCB concentration (the sum of 50 congeners)
in Ross Sea phytoplankton (mainly diatoms) and mixed zooplankton (copepods, amphipods
and krill) of 1 and 4.2 ng g?1 wet ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA034Factors affecting the breeding success of south polar skua1998-01-01T00:00:00Z1999-12-30T00:00:00Z2010-06-22T04:00:00ZAmong marine organisms breeding in Antarctica, the South Polar skua (Catharacta maccormicki) combines the traits of the species more exposed to the bioaccumulation of persistent contaminants. Skuas ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA031Organochlorine pesticides (OCPs) and polybrominated diphenil ethers (PBDEs) in Adelie penguin food web1995-12-01T00:00:00Z1996-01-30T00:00:00Z2010-06-22T04:00:00ZCod collected at Cinder Cones contained ?PBDE6 at 311 ng/g. This is more than 10-fold greater than levels in biota at other sites far from McMurdo. For comparison, a 2006 study of krill, rock cod, ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA028POPs in key species of Marine Antarctic ecosystems2000-01-01T00:00:00Z2000-01-30T00:00:00Z2001-01-01T00:00:00Z2002-12-30T00:00:00Z2010-06-22T04:00:00ZThese data set regards the average p,p'-DDE and HCB concentration (0.86?0.98 and 0.37?0.17 ng g?1 wet wt. respectively) measured in krill samples collected from the Ross Sea (71?20?S? 72? 331?S/170? ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA033Persistent Organic Pollutants (POPs) in 3 species of Antarctic Penguins2002-06-01T00:00:00Z2002-06-30T00:00:00Z2010-06-22T04:00:00ZThe data set reports the POP concentrations in three species of penguins: Ad?lie penguin (Pygoscelis adeliae), Chinstrap penguin (Pygoscelis antarctica) and Gentoo penguin (Pygoscelis papua). The ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]ECA030Polybrominated diphenil ethers (PBDEs) and organochlorine pollutants in two species of Antarctic fish2005-01-01T00:00:00Z2005-02-28T00:00:00Z2010-06-22T04:00:00ZThe data set reportes the results on the accumulation of polybrominated diphenyl ethers (PBDEs), mono- and non-ortho-polychlorobiphenyls (PCBs), polychlorodibenzodioxins (PCDDs) and polychlorodibenzofurans ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]UNITS_LICHENSBiodiversity of Antarctic terrestrial ecosystems: on-line computerized interactive floras and identification keys of Antarctic lichens.1987-01-01T00:00:00Z2006-12-31T00:00:00Z2009-03-20T04:00:00ZThe research project is based on 3 main topics.
A) Creation of on-line interactive floras and identification keys of lichens from areas of the Antarctic Continent, and in particular from Victoria ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]Antar_Macrolichen_UmbilicariaBaseline concentrations of elements in the Antarctic macrolichen Umbilicaria decussata170.1666,-77.0333,162.4166,-72.03332009-01-21T05:00:00ZTotal concentrations of major and trace elements were determined in samples of
the epilithic lichen Umbilicaria decussata from 24 ice-free areas in coastal
Victoria Land (Antarctica) during ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]Antarctic_scallopBiochemical characterization of the antioxidant system in the scallop Adamussium colbecki, a sentinel organism for monitoring the antarctic environment.2009-01-15T05:00:00ZThe scallop Adamussium colbecki can be profitably used for monitoring Antarctic coast environments but its utility would be increased if chemical analysis of pollutants were integrated with data on ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]Evolutive_adaptatament_of_Oxygen_transport_mechanismsEvolutive adaptatament of Oxygen transport mechanisms2008-04-30T04:00:00ZThe extreme environmental conditions of Antarctica represent a strong challenge to which a number of organisms have been forced to be confronted to. Understanding how these organisms have evolved ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]UNISA_DIFARMA_DESATURASESDesaturases: Extreme cold adaptation and the biological significance in Antarctic organisms165.0,-77.5,166.3,-74.51986-12-10T00:00:00Z2006-12-04T00:00:00Z2008-03-14T04:00:00ZIt has been shown that thermal stability of proteins is modified by very minor changes in the amino acid (aa) sequence. For ex., for malic dehydrogenase and other proteins, a single aa substitution ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MicroalgaeAntarcticaThe terrestrial, marine and freshwater microalgae from Antarctica: biodiversity, physiological and molecular aspects.162.5,-77.7,170.2,-72.32007-03-01T05:00:00ZThis data set describes the research carried out from 1988 to 2003 on samples
collected in the sea (Terra Nova Bay and Wood Bay), in several lakes (Edmonson
Point, Markham Island, Inexpressible Island, ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]Thermal_biosys_MountRittmannPreliminary investigation of thermal biosystem of Mount Rittmann fumaroles (Northern Victoria Land, Antarctica)165.6333,-73.4667,165.6333,-73.46672007-02-26T05:00:00ZThe biota and environment of fumarolic ground recently discovered near Mount
Rittmann are described. Three patches (about 1 m2 each) of the moss Pohlia
nutans were found in a minor caldera rim. Cyanophytes, ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]Extremophiles_in_AntarcticaExtremophiles in Antarctica during 1989-2004-180.0,-90.0,180.0,-62.832005-11-04T05:00:00ZStudies on biodiversity of microorganisms in Antarctica were carried out since
20 years. Particularly attention was made on those microorganisms defined for
their growth conditions extremophiles. ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]SouthpoleAntarctic Data from Italian Expeditions Concerning Research in Earth Sciences, Environmental, Cosmophysics, Biology, Medical Sciences-180.0,-90.0,180.0,-65.01985-01-01T00:00:00ZT00:00:00Z2005-07-28T04:00:00ZThe Italian base in Antarctica is located at Terra Nova Bay inside the Ross sea
(Lat. 74 41'42'S, Long. 164 07'23'E). The expeditions are done during the
Antarctic summer and usually run from early ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]uv_microalgaeEffects of UV-B radiations on non-marine Antarctic microalgae162.5,-77.7,170.2,-72.32005-06-28T04:00:00ZThis data set contains a list of 273 samples collected during the 1998-99 and
2000-2001 Italian Antarctic Expeditions in several non-marine environments of
Victoria Land. In particular mosses, soils, ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]Species_in_Victoria_LandEntrapment of long-distance transported pollen grains by various moss species in coastal Victoria Land, Antarctica162.0,-76.0,169.0,-72.01990-12-01T00:00:00Z1991-01-31T00:00:00Z2005-06-28T04:00:00ZIn northern Victoria Land (continental Antarctica, between 72 and 76 degrees S,
162 and 169 degrees E), 18 moss samples have been collected and analyzed for
the presence of pollen. In turfs and cushions ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]Thermophilic_bacteria_MelbourneNew record of moss and thermophilic bacteria species and physico-chemical properties of geothermal soils on the northwest slope of Mt. Melbourne (Antarctica) in 2002164.6632,-74.3499,164.6632,-74.34992005-06-28T04:00:00ZFour samples of surface soils, one with shoots of an unidentified moss species,
were collected from a geothermal site on the northwest slope of volcanic Mt.
Melbourne (northwest Victoria Land, continental ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]Biomagnification_of_mercuryBiomagnification of mercury in an Antarctic marine coastal food web during 1989-1991164.0,-75.0,178.0,-72.02005-06-27T04:00:00ZTwenty samples of surface sediment (the top 3.0 cm) were taken on soft bottoms
(from 20 to 300 m depth) with a stainless steel box corer. Phytoplankon and
zooplankton were sampled with conical nylon ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]Ion_concentr_Victoria_LandChanges of major ion concentrations in melting snow and terrestrial waters from northern Victoria Land, Antarctica.162.5,-74.9167,169.35,-72.62002-01-01T00:00:00Z2002-02-28T00:00:00Z2005-06-27T04:00:00ZConcentrations of major ions (Cl-, NO3-, SO42-, Na+, K+,Mg2+, Ca2+) where
measure in melting snow and water samples from stream and lakes in ice-free
areas throughout northern Victoria Land. Most ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]Cadmium_marine_organisms_BTNElevated cadmium accumulation in marine organisms from Terra Nova Bay (Antarctica) during 1989-1991163.0,-74.8333,164.0,-74.66672005-06-27T04:00:00ZAs a contribution towards identification of the principal environmental factors
involved in cadmium accumulation in Antarctic marine organisms and the
establishment of a baseline near the Italian ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]MetalIonsInMarineAndLacustrEnvEvolution and biogeochemical cycles of metal species in marine and lacustrine environments162.55,-77.53,176.83,-71.931995-12-01T00:00:00Z2004-02-28T00:00:00Z2005-06-27T04:00:00Z1995/96
Characterization of minor and trace metals in lacustrine ecosystems (Carezza
Lake, Inexpressible Island, Tarn Flat, Edmondson Point). Determinations in
lake waters, sediments, algae and soil. ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]GeneticDiversity_Victoria_LandGenetic diversity in the moss Pohlia nutans on geothermal ground of Mount Rittmann, Victoria Land, Antarctica.165.6167,-73.4667,165.6167,-73.46671998-12-01T00:00:00Z1999-01-31T00:00:00Z2005-06-27T04:00:00ZThe only known population of the moss Pohlia nutans in continental Antarctica
occurs on geothermally heated ground of volcanic Mt. Rittmann in northern
Victoria Land. Colonization of this bryophyte ...http://gcmd.gsfc.nasa.gov/getdif.htm?[GCMD]Ions_to_lichens_Victoria_LandThe Sea as major source of ions to lichens in terrestrial ecosystems of Victoria Land162.4167,-76.8167,169.9,-72.51671999-01-01T00:00:00Z1999-02-28T00:00:00Z2005-06-27T04:00:00ZLichens and mosses constitute the bulk of plant biomass in terrestrial
ecosystem of continental Antarctica. On the hypothesis that cryptogams can be
used as an early warning system to detect the effects ...